ToolVet
78trust / 100

Certs

by SiteCheck in Developer tools

x402 APIPassing, checked 4 h ago

Current TLS certificates for a domain from Certificate Transparency logs (via CertSpotter): issuer, validity dates and days left, DNS names (up to 100 per certificate), and the distinct subdomains seen. Keyless tier: one request per call; answers are cached an hour.

GET
https://api.sitecheck-api.workers.dev/api/certs
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
75 ms
193 ms slowest 5%
Last check
Passed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

GET https://api.sitecheck-api.workers.dev/api/certs

Each call costs $0.002 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://api.sitecheck-api.workers.dev/api/certs?domain=cloudflare.com

Parameters

ParameterTypeRequiredDescription
domainstringYesDomain name, e.g. example.com

Example response

The provider's example. We can't check it without paying.

Example response, 42 lines
{
  "attribution": "Certificate Transparency logs via CertSpotter",
  "checkedAt": "2026-10-14T07:00:57.376Z",
  "current": [
    {
      "daysLeft": 136,
      "dnsNames": [
        "staging.cp12.cloudflare.com"
      ],
      "issuer": "SSL.com",
      "notAfter": "2027-02-27T18:53:54Z",
      "notBefore": "2026-02-27T18:53:54Z"
    },
    {
      "daysLeft": 136,
      "dnsNames": [
        "cp12.cloudflare.com"
      ],
      "issuer": "SSL.com",
      "notAfter": "2027-02-27T18:53:58Z",
      "notBefore": "2026-02-27T18:53:58Z"
    },
    {
      "daysLeft": 126,
      "dnsNames": [
        "time.cloudflare.com",
        "www.time.cloudflare.com"
      ],
      "issuer": "SSL.com",
      "notAfter": "2027-02-17T21:30:57Z",
      "notBefore": "2026-02-17T21:30:57Z"
    }
  ],
  "domain": "cloudflare.com",
  "issuances": 100,
  "source": "https://api.certspotter.com/v1/issuances (Certificate Transparency logs)",
  "subdomains": [
    "accounts-test.staging.realtime.cloudflare.com",
    "accounts.staging.realtime.cloudflare.com",
    "ai.cloudflare.com"
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.sitecheck-api.workers.dev/api/certs?domain=cloudflare.com'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://api.sitecheck-api.workers.dev/api/certs?domain=cloudflare.com' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.sitecheck-api.workers.dev%2Fapi%2Fcerts
const res = await pay("https://api.sitecheck-api.workers.dev/api/certs?domain=cloudflare.com");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.sitecheck-api.workers.dev/api/certs?domain=cloudflare.com")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
4 h agoPassed402193 ms$0.002
8 h agoPassed40269 ms$0.002
13 h agoPassed40275 ms$0.002
17 h agoPassed40255 ms$0.002
21 h agoPassed40277 ms$0.002